这座大坝保护了该城免受洪水的袭击。
在这个三角洲地带，密西西比河曾经改道以控制洪水，保护居民和基础设施。
The Mississippi's flow has been altered for flood control to protect people and infrastructure in this working delta.
大片成行的杨树保护着曾经遭受洪水、大风、沙尘暴肆虐和土壤侵蚀的农田，从而促进农业生产活动。
Large swaths of planted poplar trees now protect fields once ravaged by floods, wind, sandstorms and soil erosion, giving boost to agricultural activities.
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